Apparatus for superheating steam.



E. H. FOSTER.

APPARATUS FOR SUPERHEATING STEAM.

APPLICATION man SEPT. 23, 1910.

1,136,114? Patented Apr.2o,1915.

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4.41.1 Arm/w v5 Y perritos for steam l ERNEST H. FOSTER, OF NEW YORK, N. 'Y

APFARATUS FOR SUPERHEATING STEAM.

Specification of Letters Patent.

Patented Ap r. 20, 1.9151

Application filed September 23, 1910. Serial N o. 583,341.

H0 all whom it 'may .co/zwerm Be it l'nown that l, libanesi H. FOSTER, a citizen of the lfniteil States, residing :it New York, county of Yllirfhoiouiih and State of L) New York, have invented fortuin neweud useful ln'ipriivelueiits in Apparatus for Superheuting Steam, oi ivliivli the following is :i full. clear, :unl exact ilemrription.

This invention relates to superlieuling aplere7 more partieularly boilers of the type in 'whiel'l upper ami lower drums are connected by groups or bunks of water-tubes The object of the invention to provide for such boilers impr-overl suyerheuting :1pparatus which shrill uil'orrl un adequate de gree of superheet, to birilli-nte drninege of thesuperheeter, to loeute the superheziter in a convenient part o the boiler setting, partieuilnrly in bi'iilers :ilresuljs set, to support the superhenter in au elle tive manner, and to eliminate or minimize longer of injury to the superheater by exoessive temperatures.

To these and other ends the invention oonsists .in the novel features unil combinations hereinafter described.

The preferred embodiment of the invention illustrated in the accompanying drawing, and referring .now thereto, Figure 1 is a longitudinal section through the boiler and setting, the groups or banks of boiler tubes being indicatedsdiagrenunatieally. Fig. 2 is a cross-section on line The boiler, employed in the present embodiment consists of three upjiier drums 10,

11, 1i?, connected by oireulatmg tubes 13,` 14

and e lower drum 15 eonnoeteifl to the upper drums by three banks olf tubes 1157 17, 18. In front of the tiret bunk of water tubes, 18, is tle boiler furnace, :he rooi or rurali of the same being shown ai lll. lilxteiuling downwerdlv from the uiiilille upper flrmn 1l. und in rear of tbe iniflille benk of tubes' is u baille 20, und extending univer( from the lower or nuul drum mil in rein' oly the front und rear` or i'irst :unl thiril, lmiilis: oi' tubes are buii'les ril, 2Q, the former being lllovideil neer its top with n shell' baille 2&3 for the usual purpose.

The superheuter. flesiguutml generally by 24, is located behind the rear baille :23, in the upper part of the boiler setting 25, and oonu sists preferably of an inlet header 20, enA

outlet header 27, a middle header und upwardly extending U-shaped superbeating tubes 2f) connecting the inlet and outlet heed ers to the middle bender, :is shownv The superheziting tubes are preferably of the type described in the patent of L B. Nutting, No. 9:21518. The beiulers extend preferably across the boiler setting, :unl serve to support the superhenter, thus serving as steam-cooled beams for the purpose. The headers themselves may be conveniently supported by anglo irons $50 suitably mounted in the side walls of the setting, At one end the headers are provided with valved drain pipes 3l, by which water condenser; iu the superbeeter can be drawn olf at will.

For the purpose of minimizing friction the union fittings 32, 33, by which the superheater is connected to the steam space or" the boiler and to the steam line, are each connected to the respective headers by a plurality of pipes, tor example three each, :is indicated at 34. Across the front or' the superheeter is en angle iron 35, serving to prevent forward displacement of the super heater unil serving also to support ou inclined transverse baille 3G extending down-- wardly und reerwiufdlY from the top of the boiler setting behind the bollerrum 1?. .lo the rear wall of the setting, below the suben heater, is u door 36, which can be opened to e'ord access to the sulieiheater for cleaning pur oses,l

he course of the furnace gases through the boiler setting is indicated by the arrows, and it will be seen that the gasesr flowing over the top of the rear boiler" baffle 22, are deflected downwardly and rearwardly into the collection of superheating tubes b v the super-heater baille 36, Flowing thence- UD wurilly, or in the reverse rlireetion, nino-ng the tubiY the raises enter the stack 37 through the ripening 3S in the top ol' the ling. The course ol' the grises through the superheater is sin-h as to subject the tubes moet effectively to the heul: of the gases, thus givu ing o high degree of superhezit in proportion to the temperature of the gases It will also be observed that in the arrange 2. The combination with a Swain boier having j plurality of upwardy extfndng banks of Wate tubes, und i setting indusng the boiler? ami havin t iis rem' "'mk opening for the aacapn furnace inw thff stank, of aY supsrhnnter in She Xno'ffi setting andn maar si' sd .stadi opvnng un upway nxtenng beuveen ik@ n: mwst bank of when and the: a dnwnwary exend'arg 'b the said Stack vpen'ing and f'nst named b be.

The @n .'uatiun wj istesnn miler having a: pnfn" y o upwardly extending banks of Water tube-5.1, of n snnex'haafeg-r bef jnnd the reamoq; b. nia of minis, a. transvnrse member in. fumi of he Supff'r'neater n retain the sam@ in pftm downmdy extending biliari@ sxrrax'iled in front nf ih@ sw perheaer and snppnrted nl its lnwer part, by Sad tranveive memalr., and an npvfirfy @xtmlng bnie in E'x'ont of' the r named bain@ and 'bv/hind ih@ Said renmnf' bank 0f tubes.

5.A The comhnnt'on with :L steam boiler having :1. pluraty n npxvmdy extending banks 0f wafge tu '91s, and a, wetting inc-10% ing he boier and haw/'ing in rem' of the Teal most bank n? nbs Stack npnnngf fm' tba escupe of. furnace w inw the stck, nf n superheaer in ra Smid smak fzzJ-nng. colnprsng tmx; ier 1, bemicfs 5nd .qwdy extending snafu.

Y :wing ubz: wn thereto., a bums n nace gases inm the fawk. of a super-heater in n mn in superbe?. n; tnli and @xn neghw to a pom. in f1 ,n1 nf ihn n 1t :amend im e.

Y. 'fha comhmatnn with m: 'nouer comprsing upper and lower drums con nested by a xmray of'banhs mi' water Lubes: and a ewtng @dosing the miler and having aL its top in rear of Hu; max-moss upper drum a sind( opening fmv fw esvapf. nf furnwse jm zha stack; @i mzpmu heater in rear of Said stash owning conv prsng tramways@ headers having their Qnds supporfcd in, the 5de wams of the bnler Setting; and upwardly extvndng U-fsmped Snperhcz'atng tubes Cnnnwwg tu fgn: headers; a bamanmnndng npwzuiv in front if the hond and behind said r most bank of rabes: a me extending Mmm-d the supe heating ifuluf to a pnintwnn/ the nst [mined baflp, wm n, point in front si the @tack npsnl'ziz :3nd in real' of she rearmnst bunk of Wham und n imnsvare member in frmt 0%" he 55m hanter, serving to prevent fm1-md fifjpan nent tas-of and t@ snppmf. 'tlm hmm* imitiwn nf the Said dmv 'vffu'fy Qxlnng ffxfiez,

wardlx. extending banks of weten tubes, a baffle and said stack, and superheaters arsettngmclosing the boiler and having in@ ranged beyond said baille and said stack. 1J

rear of the rearmost bank bf tubes un up- In testlmony whereof I aix my signature wardly and forwardly projecting baille, a in thepresence oftwo subscribing witnesses. stack openin behind the rearmost bank of ERNEST H. FOSTER.

tubes, a b e connected "to the tp of the Witnesses:

boiler and projecting downwardly .and rear- M. LAWSON DYER; wnrdly and located between the aforesaid S. S. DUNHAM. 

